 var loading = document.createElement("div");
 //loading.setAttribute("class",'layer noselect')
 //loading.setAttribute("style",'layer disableEvents')
 loading.classList.add("layer")
 loading.classList.add("noselect")
 loading.style.paddingTop = document.body.clientHeight*0.01+"px"
 loading.style.top = "36%"
 loading.style.width = "100%"
 loading.style.height = "30%"
 loading.style.textAlign = "center"
 loading.style.fontSize = document.body.clientHeight*0.018+"px"
 loading.style.outline = "none";
 loading.style.lineHeight= "170%"
 loading.style.backgroundColor = "rgba(1,1,1,0.0)"
 
 
 var img = document.createElement("img");
 img.src = "../img/loading.gif"
 img.style.width = document.body.clientHeight*0.12+"px"
 loading.appendChild(img);
 
 var u = document.createElement("div");
 u.style.fontSize = document.body.clientHeight*0.016+"px"
 u.style.color = "#BBB"
 u.innerHTML = "第一次下载需要等待一会"
 // - [次世代手机网页引擎]
 
 loading.appendChild(u);
 
 
 document.body.appendChild(loading);
 
 